When you tell someone that there is "Global Warming" people will inevitably ask "How much hotter?" When someone tells me that they are going to heat up a cup of water by 1.2C I'm like "Oh, that's not a big deal." However when you tell me you are going to heat up 5.1480×10^18 kg of air up by 1.2C you are talking about 100 times the energy used by the entire world in a year or 10 million megatons of TNT.